Charleston, IL Weather Forecast
Local 7-day forecast
Patchy Fog
Track current conditions, temperature changes, wind, and the full daily outlook for Charleston, IL in one place.
Patchy fog after 3am. Clear, with a low around 56. East southeast wind around 5 mph.
Local Weather Overview
This forecast page for Charleston, IL is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Aug 25, 2026 2:27 AM CDT.
The active forecast window currently covers Aug 25 to Aug 31, 2026 for Charleston, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Aug 25 to Aug 31, 2026
- Latest sync
- Aug 25, 2026 2:27 AM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Charleston
Monday looks like the warmest upcoming period in Charleston at 91 degrees F.
Overnight is the coolest period ahead with temperatures near 56 degrees F.
The strongest winds are forecast for Monday at about 7 to 10 mph SSW.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- Aug 25, 2026 2:27 AM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- ILX
- Radar station
- KILX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Patchy fog before 8am. Sunny, with a high near 82. East southeast wind around 5 mph.
Partly cloudy, with a low around 62. Southeast wind around 5 mph.
Mostly sunny, with a high near 86. South southwest wind 3 to 7 mph.
A slight chance of showers and thunderstorms between 7pm and 1am. Mostly clear, with a low around 64. West wind around 5 mph.
Sunny, with a high near 85. Northwest wind 3 to 7 mph.
Mostly clear, with a low around 62. North wind 2 to 7 mph.
Sunny, with a high near 84.
Mostly clear, with a low around 62.
Sunny, with a high near 86.
Partly cloudy, with a low around 66.
Mostly sunny, with a high near 90.
A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 71.
A slight chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 91.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Aug 25
|
Patchy Fog
|
56°F |
5 mph
ESE
|
|
Tuesday
Aug 25
|
Patchy Fog then Sunny
|
82°F |
5 mph
ESE
|
|
Tuesday Night
Aug 25
|
Partly Cloudy
|
62°F |
5 mph
SE
|
|
Wednesday
Aug 26
|
Mostly Sunny
|
86°F |
3 to 7 mph
SSW
|
|
Wednesday Night
Aug 26
|
Slight Chance Showers And Thunderstorms
|
64°F |
5 mph
W
|
|
Thursday
Aug 27
|
Sunny
|
85°F |
3 to 7 mph
NW
|
|
Thursday Night
Aug 27
|
Mostly Clear
|
62°F |
2 to 7 mph
N
|
|
Friday
Aug 28
|
Sunny
|
84°F |
2 to 6 mph
NNE
|
|
Friday Night
Aug 28
|
Mostly Clear
|
62°F |
5 mph
ENE
|
|
Saturday
Aug 29
|
Sunny
|
86°F |
5 mph
SE
|
|
Saturday Night
Aug 29
|
Partly Cloudy
|
66°F |
6 mph
SE
|
|
Sunday
Aug 30
|
Mostly Sunny
|
90°F |
6 to 9 mph
S
|
|
Sunday Night
Aug 30
|
Partly Cloudy then Slight Chance Showers And Thunderstorms
|
71°F |
7 mph
S
|
|
Monday
Aug 31
|
Slight Chance Showers And Thunderstorms
|
91°F |
7 to 10 mph
SSW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Charleston.
